1 //===-- TestArmv7Disassembly.cpp ------------------------------------------===//
2 
3 //
4 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
5 // See https://llvm.org/LICENSE.txt for license information.
6 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7 //
8 //===----------------------------------------------------------------------===//
9 
10 #include "gtest/gtest.h"
11 
12 #include "lldb/Core/Address.h"
13 #include "lldb/Core/Disassembler.h"
14 #include "lldb/Utility/ArchSpec.h"
15 #include "lldb/Target/ExecutionContext.h"
16 
17 #include "Plugins/Disassembler/LLVMC/DisassemblerLLVMC.h"
18 #include "llvm/Support/TargetSelect.h"
19 
20 using namespace lldb;
21 using namespace lldb_private;
22 
23 class TestArmv7Disassembly : public testing::Test {
24 public:
25   static void SetUpTestCase();
26   static void TearDownTestCase();
27 
28   //  virtual void SetUp() override { }
29   //  virtual void TearDown() override { }
30 
31 protected:
32 };
33 
34 void TestArmv7Disassembly::SetUpTestCase() {
35   llvm::InitializeAllTargets();
36   llvm::InitializeAllAsmPrinters();
37   llvm::InitializeAllTargetMCs();
38   llvm::InitializeAllDisassemblers();
39   DisassemblerLLVMC::Initialize();
40 }
41 
42 void TestArmv7Disassembly::TearDownTestCase() {
43   DisassemblerLLVMC::Terminate();
44 }
45 
46 TEST_F(TestArmv7Disassembly, TestCortexFPDisass) {
47   ArchSpec arch("armv7em--");
48 
49   const unsigned num_of_instructions = 3;
50   uint8_t data[] = {
51       0x00, 0xee, 0x10, 0x2a, // 0xee002a10 :  vmov   s0, r2
52       0xb8, 0xee, 0xc0, 0x0b, // 0xeeb80bc0 :  vcvt.f64.s32 d0, s0
53       0xb6, 0xee, 0x00, 0x0a, // 0xeeb60a00 :  vmov.f32 s0, #5.000000e-01
54   };
55 
56   // these can be disassembled by hand with llvm-mc, e.g.
57   //
58   // 0x00, 0xee, 0x10, 0x2a, // 0xee002a10 :  vmov   s0, r2
59   //
60   // echo 0x00 0xee 0x10  0x2a | llvm-mc -arch thumb -disassemble -mattr=+fp-armv8
61 	//       vmov s0, r2
62 
63   DisassemblerSP disass_sp;
64   Address start_addr(0x100);
65   disass_sp = Disassembler::DisassembleBytes(arch, nullptr, nullptr, start_addr,
66                                  &data, sizeof (data), num_of_instructions, false);
67 
68   // If we failed to get a disassembler, we can assume it is because
69   // the llvm we linked against was not built with the ARM target,
70   // and we should skip these tests without marking anything as failing.
71 
72   if (disass_sp) {
73     const InstructionList inst_list (disass_sp->GetInstructionList());
74     EXPECT_EQ (num_of_instructions, inst_list.GetSize());
75 
76     InstructionSP inst_sp;
77     const char *mnemonic;
78     ExecutionContext exe_ctx (nullptr, nullptr, nullptr);
79     inst_sp = inst_list.GetInstructionAtIndex (0);
80     mnemonic = inst_sp->GetMnemonic(&exe_ctx);
81     ASSERT_STREQ ("vmov", mnemonic);
82 
83     inst_sp = inst_list.GetInstructionAtIndex (1);
84     mnemonic = inst_sp->GetMnemonic(&exe_ctx);
85     ASSERT_STREQ ("vcvt.f64.s32", mnemonic);
86 
87     inst_sp = inst_list.GetInstructionAtIndex (2);
88     mnemonic = inst_sp->GetMnemonic(&exe_ctx);
89     ASSERT_STREQ ("vmov.f32", mnemonic);
90   }
91 }
92